Compliant viscous seal for fluid transfer device

摘要

The seal (12) has a sealing sleeve (24) extending axially in a hole and including an inner surface closely surrounding a drive shaft. A helical groove is formed in the inner surface. An annular gap permits limited pivotal movement of the sleeve relative to an outer body (20) to allow the sleeve to coaxially align with the shaft. An annular seal (40) e.g. O-ring, is provided between the sleeve and body to seal the annular gap. Independent claims are also included for the following: (a) a gear pump (b) a fluid transfer device.